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STEAM ENGINE... No. 276,970.. Patented May 1, 14883.

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UNITED A ST TES AMARIAH W. JACKSON AND GOURTLAND S. WHITE PATENT OFFICE.

SAID JACKSON ASSIGNOR TO CHARLES F. HUNT, OF SAME PLACE. I

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent 1\To. 276,970, dated MayApplication filed Mean 16, 1883. (Model) Toall whom it may concern:

Be itkuown that we, AMARIAH W. JACK- SON and (JOURTLAND S. WHITE,citizens of the United States, residing at Chicago, in the 5 county ofCook and State of Illinois, have in- "ented certain new and usefulImprovements r in Steam-Engines, of which the following is aspecification, reference being had to the ac- I companying drawings.

1o Thisinvention relates to' certain improvements in that classofsteam-engines known as foscillating engines, and it'has for its objectto simplify andcheapen the construction of the same and prod uceacompact and smoothly-working engine, as more fu'llyhereinafterspecified. These objects we attain by the means illustrated in theaccompanying drawings, in which- Figure 1 represents a transversevertical sectional view of our improved engine, taken on the line or mof Fig. 2; and Fig. 2,a longitudinal sectional view ofthe engine,showingthe valves in elevation.

The letter A indicates a metallic shell or casing of segmental shape,having at its bottom a semi-cylindrical seat, B, for the valves, .andthe hub on which the piston'oscillates, as more fully hereinafterspecified. Into the bottom of the said semi-cylinclrical seat, near the3:) ends, extend the induction-pipes Cqand at each side'of saidinduction-pipes are formed the eduction-ports D, as shown in Fig. 1 ofthe drawings. The casing is provided with snitable heads, E, which aresecured to the flanges Fat the ends of the casing by means of screwboltsor otherwise. The heads are provided with journal-bearings for a shaft,G, which passes through the lower portion of the casing. The letter Hindicates aflat piston, which is cast with a cylindrical huh, I, throughwhich the shaft passes, thesaid section beingadapted to oscillate inthesemi-cylindrical recessabove Mmentioned At each side of said section is(located a cylindrical valve, K, the said valves being mountedlooselyontheshaftandadapted H to oscillate in the semi-cylindricalseat abovementioned. The said valves'are provided with ports]; M, and atthe endswith recesses N, in

I which are adapted to work the lugs Pon the shaft G, for the purposehereinafter set forth.

The heads of the casing areprovided with annular recesses R, in whichset the annular packing-rings S, through which the shaft passes, thesaid rings being held in place by means of the screws T, The piston hasthe hub cast with it or is rigidly connected to the curely' fastened tothe shaft, so as to turn it when the said piston is oscillated.

The piston being in the position shown in Fig. 1, the steam is admittedthrough the induction-pipes G, and passes through the port M in thevalves, causing the piston to travel to and eduction-port D at one side.When the piston has nearly completed its stroke the lugs on theshaftengage the recesses m in the valves, causingthe valves to shift so as toreverse opposite direction. By attaching cranks to the shaft, connectedby means of suitable pitmeii to the cranks of a fly-wheel, a rotarymotion suitable for imparting power to machinery may be obtained.

we claim, and desire to secure by Letters Patent, is i The combination,in an engine, of the angusuitable induction-pipes and eductionports, ashaft to which is keyed a hub adapted to work in said seat, anoscillating piston cast with AMARIAH wQJAoKsoN. UOURTLAND s. WHITE.

' Witnesses:

HENRY C. STRONG,

JOHN F. FLOWER.

, OF OHIOAGOJLLI'NOIS,

same, and the hub is keyed or otherwise se= said hub, twopartially-rotating valves provided with ports and recesses at theirends, 8 5

The operation of our invention is as follows: .60

the left, forcing the air out through the portL the portsand cause thepistonto travel in the Having thus described our invention, what larcasing, having asemi-cylindrical seat, with

